张永瑞 党晓菲 刘威



摘要 为了探究茶白星病对茶叶主要生化成分的影响,以不同品种染病茶树的健康叶片和感病叶片及未感病茶树的叶片为试验材料,测定叶片中茶多酚、咖啡碱、游离氨基酸、水浸出物等含量的变化。结果表明,感病植株叶片的茶多酚、咖啡碱、水浸出物含量与未感病植株叶片相比总体呈下降趋势,氨基酸含量总体呈上升趋势。感染茶白星病会对茶叶生化成分产生明显的影响,但不同品种茶树间存在差异。
关键词 茶白星病;茶叶;生化成分
中图分类号 S435.711 文献标识码 A
文章编号 1007-5739(2020)13-0087-02 开放科学(资源服务)标识码(OSID)
Abstract In order to explore the effect of tea white scab disease on the main biochemical components of tea leaves, healthy leaves and susceptible leaves of different varieties of tea infected with tea white scab disease and leaves of tea uninfected with white scab disease were used as test materials to determine the content of tea polyphenols, caffeine, free amino acids and water extract. The results showed that the contents of tea polyphenols, caffeine, and water extracts of the susceptible leaves showed a general downward trend compared with the leaves of non-susceptible tree, and the content of amino acids generally increased. Infection with tea white scab disease had a significant effect on tea biochemical components, and there were differences between different varieties of tea trees.
Key words tea white scab disease; tea; biochemical component
茶白星病是危害茶树叶片的主要病害之一[1]。病原物侵染茶树后,茶树体内会发生生理生化反应来阻止病原物进一步发展,已有研究表明,茶树芽叶感染白星病后,茶叶中有效成分的含量降低,各种成分的比例也会发生改变,造成茶味苦涩、产量和品质下降[2]。周玲红等[3]研究感染白星病后茶鲜叶化学成分变化发现,与健叶相比,病叶茶多酚、咖啡碱、水浸出物等生化成分均有降低趋势,氨基酸含量上升。周凌云等[4]以蒸青叶为试验材料研究茶白星病对茶叶品质的影响,也得出相似的结果。不同品种茶树对病害抗性不同,染病后生理反应也不同,因而有必要对不同茶树品种感染茶白星病后的化学成分进行分析。本文对信阳当地栽培的几个感染茶白星病茶树品种的茶树鲜叶进行化学成分测定,以明确不同品种茶树染病后鲜叶化学成分变化情况,以及感染茶白星病的病叶与健叶化学成分差异。……